Avoid, attack or do both? Behavioral and physiological adaptations in natural enemies faced with novel hosts

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dc.creatorVacher, Corinneen
dc.creatorBrown, Sam P.en
dc.creatorHochberg, Michael E.en
dc.date.accessioned2014-12-15T17:10:31Zen
dc.date.available2014-12-15T17:10:31Zen
dc.date.issued2005-11-04en
dc.descriptionCorinne Vacher is with the Equipe Biologie des Populations en Interaction, Institut National de la Recherche Agronomique (UMR1112), 06903 Sophia-Antipolis Cedex, France, -- Sam P. Brown is with the Section of Integrative Biology, University of Texas at Austin, Austin TX 78712, USA and -- All authors are with the Laboratoire Génétique et Environnement, Institut des Sciences de l'Evolution (UMR5554), Université Montpellier II, 34095 Montpellier Cedex 5, Franceen
dc.description.abstractBackground: Confronted with well-defended, novel hosts, should an enemy invest in avoidance of these hosts (behavioral adaptation), neutralization of the defensive innovation (physiological adaptation) or both? Although simultaneous investment in both adaptations may first appear to be redundant, several empirical studies have suggested a reinforcement of physiological resistance to host defenses with additional avoidance behaviors. To explain this paradox, we develop a mathematical model describing the joint evolution of behavioral and physiological adaptations on the part of natural enemies to their host defenses. Our specific goals are (i) to derive the conditions that may favor the simultaneous investment in avoidance and physiological resistance and (ii) to study the factors that govern the relative investment in each adaptation mode. -- Results: Our results show that (i) a simultaneous investment may be optimal if the fitness costs of the adaptive traits are accelerating and the probability of encountering defended hosts is low. When (i) holds, we find that (ii) the more that defended hosts are rare and/or spatially aggregated, the more behavioral adaptation is favored. -- Conclusion: Despite their interference, physiological resistance to host defensive innovations and avoidance of these same defenses are two strategies in which it may be optimal for an enemy to invest in simultaneously. The relative allocation to each strategy greatly depends on host spatial structure. We discuss the implications of our findings for the management of invasive plant species and the management of pest resistance to new crop protectants or varieties.en
dc.description.catalogingnotevacher@antibes.inra.fren
dc.description.departmentIntegrative Biologyen
dc.description.sponsorshipen
dc.identifier.Filename1471-2148-5-60en
dc.identifier.citationVacher, Corinne, Sam P. Brown, and Michael E. Hochberg. “Avoid, Attack or Do Both? Behavioral and Physiological Adaptations in Natural Enemies Faced with Novel Hosts.” BMC Evolutionary Biology 5, no. 1 (November 4, 2005): 60. doi:10.1186/1471-2148-5-60.en
dc.identifier.doidoi:10.1186/1471-2148-5-60en
dc.identifier.urihttp://hdl.handle.net/2152/27893en
dc.language.isoEnglishen
dc.publisherBMC Evolutionary Biologyen
dc.rightsAdministrative deposit of works to UT Digital Repository: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access at http://www.biomedcentral.com. The public license is specified as CC-BY: http://creativecommons.org/licenses/by/4.0/. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en
dc.subjectbehavioral adaptationen
dc.subjectphysiological adaptationen
dc.subjectavoidance behaviorsen
dc.titleAvoid, attack or do both? Behavioral and physiological adaptations in natural enemies faced with novel hostsen
dc.typeArticleen

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